Improvement in geinddtg-mills



A. H; WAGNER. Millstne Balance.4

Patented June 2, 1868.

N. PETERS. PMOTO-UTNOGRAPNER. WASHINGTON D C @auch ttctrs gat-rut @fitta Letters Patent No. 78,624, dated June 2, 1868.

IMPROVEMENT IN GRINDING-MILLS.

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TO ALL WHOM IT MAY GONCERN:

Be it known that I, AWSBERT H. WAGNER, of Staunton, Augusta county, State of Virginia, have invented certain new and useful Improvements in Grinding-Mills; and I do hereby declare the following description and accompanying drawings are sufficient to enable any person skilled in the art-or science to which it most nearly nppertains to make and use my said invention or improvements without further invention or experiment.

The nature of my invention and improvements consists in arranging some inclined planes and rollers underY the bed-stone, to raise and lower it, and adjust it to the upper stone; also, in a spider and screw-rod, for adjusia ing the rollers on thc inclined planes under the stone. I

In the accompanying drawings i Figure l is an elevation of a mill with my improvements.

Figure 2 is a plan, with the .stone shown by dotted line. Figure 3 is the lower end ol' the spindle and step-box. j Figure 4, thc upper end of the spindle, enlarged, with the nut and driver. Figure 5, the bushing and plate in the upper stone, enlarged. In the frame of the mill there are four posts. lwo of these are shown at A A, connected by the bar B and girder C, making a strong quadrangular eubieal frame, to support the other parts of the inill. `D is a centro-bar, fastened to the under side of the bars B B, shown by dotted lines in iig. I; and to this bar'tlie stepbox E is fastened, for the ruill-spindle F to turn in. The upper journal of the spindle turns in the floor G, fastened to the top of the frame,- or in a bushing, fastened to the floor or stone, or both, as may be preferred. A gear or pulley, H, may be fastened to the spindle F, to turn it from some moving-power, and operate the mill. The step-box E, for the foot of the spindle to turn in, is provided with two anges, I I, by which it is fastened to the har D. The inside of the box E is larger than the foot ofthe spindle, which has a collar, J, on it, above the pin K, with a lug on the collar against the pin, so that the pin will turn the collar under ythe bushing L, which-fits the inside ofthe step-box, and is prevented from turning bythe screw M in thestep-box; and r above the bushing there is a stationary perforated plate, N, around the spindle, with Abolts passing through its armsinto the bar D, to hold the spindle and upper stone down against the upward pressure of the under stone when grinding. '.lhe bushing P is fastened to the floor Gr, and extends up into the lower stone Q, around the spindle. The upperend of the spindle has a conical shoulder, R, for the plate S to rest on, which is fastened in the upper stone Tin some convenient manner, and the grain passes down each side of this plate, and between the stones, t'o he'ground The plate S may be countersunl; on one or both sides, and there is a conical nut, S', fitted to the top of the spindle, and screwed down on to the plate, so as to hold the stone down, when grinding, against the pressure of the lowenstone, which is raised up against it by the rollers U U, which not against the under sideI of the lower stone, and are tit-ted to turn on the arms of the spider-frame V, which is fitted to turn on the bushing P, as shown in thc drawing. The spider V mayhave three or more arms, with rollers U U on the ends, and just insidev of the rollers U U the rollers W W, which 'roll on the inclined planes X X asthe spider is vibrated by the rod Y, which passes through the stand "Z, fastened to the frame, so that, by turning the nut a, the rodmoves the spider, carrying the rollers W-up the inclined planes X, and raises the lower stone Q up against thc stone, T, or adjusts the lower stone to thc upper one, to make them grind fine 0r coarse, as t n desired. lhe driver I) is fastened to the spindle just below the conical shoulder It, and has a. horn projecting upwards at each end, which horns act against the plate S, and turn the upper stone.

The bifurcatcd stands d are fastened to thc door G,ifor the pins e e to traverse in as the stone moves up and down, which stands and pins prevent the stone from turning. The spindle F is attencd on one or more sides, to give motion to the bar g, to shake the shoe, which may be connected to it.

It is a great advantage to make the shoulder on the upper end of the spindle conical, and the under side of the nut conical, also, as it permits the plate in the upper stone to vibrate and adapt the upper to thc lower stone.

In combination with the lower millstone, I claimp 'lhc spidcrV, the rollers U W, the inclines X X, the rod Y, and nut a, when arranged and operating inthe manner and for the purposes specified.

"t, Witnesses: l B. F. PoINrz, I. H. TROUT.

AWSBERT l-I. WAGNER. 

